PeakTech 5610 Bedienungsanleitung Seite 33

A measurement on glossy, reflective or transparent objects falsifies
the measurement result. It is recommended to color a spot on the
test object matt-black or to attach a matt-black adhesive strip on it,
on which the temperature is measured after adjusting.
Deviating emission factors can be changed before each
measurement in the menu and taken from the following table:
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